    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>${title!"后台管理系统"}</title>
    <link rel="stylesheet" href="/static/css/style.css">
    <link rel="stylesheet" href="/static/bootstrap/css/bootstrap.css">
    <link rel="stylesheet" href="/static/font-awesome-4.7.0/css/font-awesome.css">